Table 1.

Distribution of the severity of OSAS at each UA level

OSAS severity; AHI	n (%)	Mean VP collapse (%; ± SD)	Mean BOT collapse (%; ± SD)	Mean LPW collapse (%; ± SD)
Mild; 5 to 15 events per hour	194(38)	85(±18)	59(±20)	54(±21)
Moderate; 15 to 30 events per hour	163(32)	84(±17)	63(±20)	59(±22)
Severe; 30+ events per hour	149(30)	87(±12)	72(±18)	67(±23)

This table shows the association between each AHI category (mild = 5 ≤ AHI < 15; moderate = 15 ≤ AHI < 30; severe = 30 ≤ AHI). n (%) = sub-sample size (percentage of overall sample). The mean collapse at each UA is shown at each level of AHI